What distinguishes the first wāw from the succeeding wāws in the oath sequence?

Supplementary Practice 27 — Comparative Rhetoric of Sūrat al-Shams and Sūrat al-Layl

• All are circumstantial wāws
• The first is oath-wāw; later wāws coordinate further oath objects
• Each subsequent wāw requires its own oath response
• The first is only a resumption particle